The final pressure test of a 2014 newly installed pipeline m a drinking water power plant in the South Tyrolean community Mals (Italy) showed a pressure loss out of range, which prevented the plant's commissioning. Thus the company MTA Messtechnik GmbH has been tasked to identify the reasons for the losses as quickly as possible using its newly developed pipeline inspection system Pipe-Inspector. The decision for Pipe-lnspector was based on the ability of the system to inspect long pipeline sections wirelessly, both optically and acoustically, in a single pass. The contract was awarded in December 2014 at a time when low temperatures and extensive snowfalls are not uncommon at the site in over 2,000 m above sea level, so that the time frame was very short to investigate and eliminate the potential damage in order to put the facility into operation as planned still in 2014.

The affected ductile cast won pipeline, DN 200, is located outside the settlement area in mountain terrain at about 2,000 m above sea level. Access is possible only via unpaved paths. The newly constructed pipeline was designed to replace the existing potable water pipeline m need of renovation and to feed a newly built small hydropower plant. The total length of the pipeline section to be inspected with multiple 22 bends was 630 m, its operating pressure 30 bar (Figure 1)

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